A nilsimsa code is something like a hash, but unlike hashes, a small
change in the message results in a small change in the nilsimsa code.

The Digest::Nilsimsa module allows you to compute nilsimsa codes from within
Perl programs.

Information on Nilsimsa can be found here:
 http://ixazon.dynip.com/~cmeclax/nilsimsa.html
